i am very interested with Voigtlander 12mm F5.6 with Fujifilm X-Mount camera, may I know what adapter suitable for Voigtlander 12mm F5.6? I know that is a Fujifilm M Mount Adapater there, you can connect to Voigtlander 12mm but it will have some minor problem like color casting or other problem.

The M mount adapters have no glass, they only allow the lens to be physically attached to the camera so there won't be any color cast changes due to the adapter. The 12mm Voightlander though shows a bit of CA on the borders and corners of the frame when used with Fuji's cameras.